RC,
Hi, I don't think that Vinny's disillusionment was with Reiki itself but with the people who just didn't see the value of his message and with the overwhelming majority who continue to teach all sorts unrelated material as Reiki.
I also think that there were some other events in his life that took a toll. Don't know what those might be but I got that impression a couple of times.
Anyway, just my impressions.
Wish I had known him better as well.
Walk in beauty,
Rebecca